Self-retaining gatheter.



H. BISGAARD.

SELF RETAINING CATHETER. APPLICATION FILED MAR. 5. 1915.

Patented Dec. 5, 1916.

HOLGER BI-SGAARD, 0F GLAIVISBJERG, DENMARK.

SELF-RETAINING CATHETER.

morass.

Specification of Letters Patent.

Patented Dec, 5, T916.

Application filed March 5, 1915. Serial No. 12,384.

T 0 all whom it may concern:

Be it known that I, HOLGER BISGAARD, physician, a citizen of the Kingdomof Denmark, and residing at Glamsbjerg, Island of Funen, in the Kingdomof Denmark, have invented certain new and useful Improvements inSelf-Retaining Catheters; and I do hereby declare the following to he afull,

clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to letters or figures of reference marked thereon, which form a partof this specification.

This invention refers to a catheter at demeure (selfretaining catheter),the characteristic feature of which is that, at the interior end of anotherwise ordinary catheter, there is fastened a pulling member, which,for a short distance, is passed outside of the catheter, so that thispart of the oatheter, by means of the pulling-member, can be bent downinside the bladder. When the pulling-member, for instance a string, or amore or less rigid wire, thread, or ligature (passed through theinterior of the catheter) is released, the deformation of the end of thecatheter will be abolished either spontaneously or by means of a slightpull of the catheter, which can then beextracted with the same case asan ordinary, smooth catheter. The catheter in question can, of course,be inserted into the bladder through a fistula, and'likewise it can beinserted into other cavities than the bladder, and it can be insertedWith or without the use of a stilletto.

One form of construction of this catheter is shown in the drawing. Thecatheter here shown is like the ordinary flexible catheters of uniformthickness, but at its anterior, closed and rounded end 1 there isattached in a suitable manner a string 2, which, for a suitably longdistance, is disposed 011 the outside of the catheter and then passed inthrough a hole in the wall of the catheter, said hole being preferablyfurnished with a reinforcing rim 3. The string, or ligature, is thenpassed on through the catheter and out at its lower end 4. When thecatheter is inserted far enough, the portion inside the bladder (l3) canbe bent down by pulling the string, or ligature, 2, and, from thecentral position indicated by dotted lines, can be brought into positionfor use, in that the end 1 of the catheter is drawn down close to thehole (3), thus forming a loop. The lower end of the string, or ligature,is then wound around the lower end 4 of the catheter and secured bymeans of a hitch 5,

.or the like. The urine is drawn off through one or more suitable holes6. The lower end of the catheter can be closed by means of a plug.

Instead of being passed through the wall of the catheter, the string, orligature, 2, or another more or less rigid pulling member, can be passedthrough a longer or shorter canal in the longitudinal direction of thecatheter wall, or may lie on the outside of said wall throughout theentire length of the catheter.

I claim V A hollow flexible catheter having an opening near its end, aflexible tension member secured to its anterior end and passing throughsaid opening and the interior thereof to the opposite end, whereby whensaid member is drawn tight a self-retaining loop will be formed at theanterior portion of the catheter.

In testimony that I claim the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

HOLGER BISGAARD.

Uopics of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. U.

